VouchSafe - The Easy, Effective Replacement for CAPTCHAs.

VouchSafe is an easy, effective replacement for traditional CAPTCHAs. Like CAPTCHAs, VouchSafe is a simple test designed to separate human users from bots, to help prevent spam and some kinds of online fraud. VouchSafe is the first image-based Human Interactive Proof that uses an Adaptive AI to generate challenges based on the way humans think. As more people make use of VouchSafe, the AI that drives it learns from their responses and adapts to the choices they make.

To complete a VouchSafe challenge, users simply use their mouse to draw a line to match two objects that are related, or to circle an object that doesn't belong.

VouchSafe also provides keyboard accessible audio challenges for the visually or motor impaired.

VouchSafe was created by ShareThink Ltd. To learn more about VouchSafe, you can click here to watch a short introductory video, or click on the "About VouchSafe" button above to view the full video.

VouchSafe is completely free. To get VouchSafe for your website, simply click on the "Get Vouchsafe" button above.

People Friendly

VouchSafe is designed to be intuitive and easy to use. Challenges take as little as 2 seconds to solve.

Future Friendly

VouchSafe is a perfect fit for touch interfaces on smart phones and tablets like the iPad.

Secure

VouchSafe is more secure than most image-based or traditional glyph-based CAPTCHAs. Spammers don't like it.

Accessible

VouchSafe offers the visually impaired an improved user experience and features like keyboard shortcuts.